We all know that data entities that have the same root datasource (table) as a form will cause the data entity to automagically appear in the form's Open in Excel menu option. What if you need to force add this option via extension? It's a very reasonable request that you'll get asked to do, and is surprisingly hard to research. Until now.
The code has changed a bit throughout D365's evolution. If anything, it's gotten simpler since you no longer have to implement any ExportToExcel* classes.
Need more fields to appear in your Excel sheet? Add them to the AutoReport fieldgroup of the table!